61344564 has 12 divisors (see below), whose sum is σ = 143137344. Its totient is φ = 20448184.

The previous prime is 61344539. The next prime is 61344571. The reversal of 61344564 is 46544316.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2556012 + ... + 2556035.

It is an arithmetic number, because the mean of its divisors is an integer number (11928112).

Almost surely, 2^61344564 is an apocalyptic number.

It is an amenable number.

61344564 is an abundant number, since it is smaller than the sum of its proper divisors (81792780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61344564 is a wasteful number, since it uses less digits than its factorization.

61344564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112054 (or 5112052 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 61344564 is about 7832.2770635365. The cubic root of 61344564 is about 394.3895157585.

The spelling of 61344564 in words is "sixty-one million, three hundred forty-four thousand, five hundred sixty-four".